Core Insights - The use of heating equipment, specifically the "warming cannon," is crucial for strawberry cultivation during extreme cold weather, maintaining temperatures above 5 degrees Celsius in greenhouses [1][2] Group 1: Equipment and Techniques - The "warming cannon" can quickly raise greenhouse temperatures by over 10 degrees Celsius, serving as an essential tool for winter strawberry growth [1] - Practical tips for using the warming cannon include placing the machine at least 50 centimeters above the strawberry plants, checking the air outlet for obstructions, and accurately adjusting the temperature settings to ensure energy efficiency and optimal growth conditions [1] Group 2: Expert Recommendations - Experts recommend using gas or oil-based heating devices like the warming cannon and hot air machines to automatically increase greenhouse temperatures by 3 to 5 degrees Celsius, ensuring temperatures do not drop below 5 degrees Celsius to prevent frost damage [2] - Caution is advised when using alternative heating methods such as charcoal or coal stoves due to the risk of carbon monoxide poisoning, necessitating proper ventilation before entering the greenhouse [2]